-LRB- CNN -RRB- -- Beverly Hills , California , police want Lindsay Lohan to turn herself in on an arrest warrant issued Friday .

Lindsay Lohan was placed on three years ' probation after being convicted of drunken driving in 2007 .

A police official told CNN on Saturday that officers will be on the lookout for the actress-singer until she does so .

It was n't clear why Lohan was being sought , but the warrant , issued by a Los Angeles Superior Court judge in Beverly Hills , apparently stems from her 2007 convictions for drunken driving , Beverly Hills police Sgt. Mike Foxen said . She is serving three years ' probation for those convictions .

`` We 're hoping that she will turn herself in , '' Foxen said .

Calls to Lohan 's publicist and manager have not been returned .

Once arrested , Lohan , 22 , could go free after posting a $ 50,000 bond , Foxen said .

Lohan was arrested twice in 2007 on driving under the influence charges , with a cocaine possession charge in the second incident .

The first arrest in May came after Lohan lost control of her Mercedes-Benz convertible and struck a Beverly Hills curb .

Just two weeks after checking out of a Malibu drug and alcohol rehab facility , she was arrested again in July 2007 after a woman called Santa Monica police saying Lohan was trying to run her down in a car .

A judge sentenced Lohan to three years ' probation after she entered guilty and no-contest pleas to the charges . She served less than two hours in jail .

Lohan 's acting career , which started at age 10 on a soap opera , took off on the big screen a year later when she played identical twins in Disney 's `` The Parent Trap . ''

Since then , she has starred in at least a dozen movies , including `` Mean Girls '' and `` Georgia Rule '' with Jane Fonda in 2007 .

Her pop music recording career , boosted by her movie roles , has floundered . She last released an album in 2005 .

CNN 's Irving Last contributed to this report .

@highlight

Los Angeles judge issues arrest warrant for troubled actress

@highlight

Cause uncertain but related to DUI convictions , police sergeant says

@highlight

Lohan known for Disney movies and hard partying